This ebay seller just reassured me that these bolts are for UT cranksets - due to the limited description if you have any doubts (as I did - especially since there are 2 offered when the crank only needs 1....) then please email him before taking my word for validity of the item (I bought 4.......hope they are as he described via emails......)

I do find the claimed weight savings to be suspect too - I'd guess about 8 - 10 grams per bolt (and only one used...) - but still a few grams saved is a few grams saved!!!!!!!!!!!!!!!!

Best to torque it with the steel bolt and then replace it with the ti. Don't forget the ti lube as it will freeze without it

That would do no good at all. The hirth joint is not some sort of tapered fit that like the old square taper or an ISIS BB. The Hirth comes apart easily by hand, once the bolt it removed. The Ti prep would be a good idea. The 42Nm torque is not that large. If the bolt can't take that, it's a piece of junk.

Last edited by DaveS on Tue Nov 24, 2009 2:39 pm, edited 1 time in total.

Seems like the Shimano ones are the best bet, as they are steel and use the standard UltraTorque tool. Spare part No Y-1E4 98020 and still fairly widely available. I'll be swapping mine on my WW bike and getting a free 7g saving from the parts bin. Result!

A Shimano bolt on a Campagnolo Crank??!?!?! LOL Seriously though.... I would assume Campagnolo has made that bolt heavier for a reason is all I am saying... You'd figure they would do their normal thing.. one year the product comes out, next year they add some Carbon or Ti bling to save 10 grams.. they never did that with UT crank though... Oh well, your crank not mine

A bolt which is hidden in the middle of the BB spindle isn't going to be bling whatever you make it from, so it's hardly a candidate for a "Super Record" variant, and you can't label it Ti if you carefully examine the situation and decide that steel really is the best material to use (as I believe it is, in this application)

Due to my "project" bike not coming together right away (with 2010 steel spindled SR crank), I didn't learn until much, much later that the head of these bolts were ever so slightly too large to work without a small bit of modificaton. So by then the 2011 titanium spindle crankset had been released (with left hand thread on that Ti bolt) so I bought that crankset and sold the bolts (and the 2010 crank separately) on ebay with full disclosure of the bolt issue. So if you come across an ebay seller with a simillar item - don't buy into it - Use the Campy steel bolt unless you have the SR Ti cranks and bolt

Last edited by tommasini on Sat Sep 03, 2011 1:31 pm, edited 3 times in total.

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